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3 years ago

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What shape do ice crystals have? How does hydrogen bonding cause that shape?

$\text{Thank you!}$

Chemistry

1 answer:

BigorU [14]3 years ago

5 0

Answer:

Water molecules in the solid state, such as in ice and snow, form weak bonds (called hydrogen bonds) to one another. These ordered arrangements result in the basic symmetrical, hexagonal shape of the snowflake.

Explanation:

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When 2.5000 g of an oxide of mercury, (hg soy) is decomposed into the elements by heating, 2.405 g of mercury are produced. calc

alexgriva [62]

For Hg :
2405 g mol / 200.59 g = 0.0012 mol
For O:
( 2.5000 - 2.405 ) g mol / 15.999 g = 0.006 mol
0.012 : 0.006 = 2 Hg
0.006 : 0.006 = 1 O
Answer:
The empirical formula is Hg 2 O.

4 0

4 years ago

How many joules must be added to a 1000 g iron skillet to increase its temperature

kap26 [50]

Answer:

B) 101,025

Explanation:

1000g * 0.449 J/g Celsius * 225 Celsius = 101,025

I got 225C from 250C - 25C

4 0

3 years ago

Give the name and formula of the compound formed from the following elements: a) Sodium and nitrogen b) Oxygen and strontium c)

elena-s [515]

Answer: a) Sodium and nitrogen : $NaN_3$ : sodium nitride.

b) Oxygen and strontium : $SrO$ : strontium oxide.

c) Aluminum and chlorine : $AlCl_3$ : aluminium chloride.

d) Cesium and bromine : $CsBr$ : cesium bromide.

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

a) Sodium and nitrogen : Here sodium is having an oxidation state of +1 called as $Na^{+}$ cation and nitrogen forms an anion $N^{3-}$ with oxidation state of -3. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $NaN_3$ named as sodium nitride.

b) Oxygen and strontium : Here strontium is having an oxidation state of +2 called as $Sr^{+}$ cation and oxygen forms an anion $O^{2-}$ with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $SrO$ named as strontium oxide.

c) Aluminum and chlorine : Here aluminium is having an oxidation state of +3 called as $Al^{3+}$ cation and chlorine forms an anion $Cl^{-}$ with oxidation state of -1. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $AlCl_3$ named as aluminium chloride.

d) Cesium and bromine : Here cesium is having an oxidation state of +1 called as $Cs^{+}$ cation and bromine forms an anion $Br^{-}$ with oxidation state of -1. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $CsBr$ named as cesium bromide.

7 0

3 years ago

in a titration a 25.0 ml of 0.500 m khp is titrated to the equivalence point NaOH. The final solution volume is 35.5 mL. what is

borishaifa [10]

M2= 0.35M

Formula: M1 • V1 = M2 • V2

1) 25.0mL • .500M = 35.5mL • (x)

2) 12.5 = 35.5 • (x)

3) 12.5/35.5 = x

4) 0.35211 = x = M2

Hope this helps!

5 0

3 years ago

Gasoline boils at a relatively low temperature (about 150°C). The kerosene is removed at around 200°C, followed by diesel oil at

asambeis [7]

Explanation:

The teacher is most likely talking about the fractional distillation process.

Fractional distillation: It is a separation technique used to separate different components of the given mixture on the basis of their difference in boiling points of the different components. The component with lowest boiling point will get separate out first from the mixture and the vapors formed from boiling are condensed in a separate container.

So, when the fractional distillation of mixture of oils and fuels is carried out gasoline will separate out first due to lower boiling temperature and then kerosene followed by diesel and others (fuels and oils).

6 0

3 years ago